You can cast a spell with a moment's thought.
Prerequisite: -
Benefit: Casting a quickened spell is a free
action. You can perfom another action, even casting another spell, in
the same round as you cast a quickened spell. You may cast only one
quickened spell per round. A spell whose casting time is more than 1
full round action can not be quickened. A quickened spell uses ip a
spell slot four levels higher than the spell's actual level. Casting a
quickened spell does not provoke an attack of opportunity.
Normal: -
Special: This feat can not be applied to any
spell cast spontaneously (including sorcerer spells, bard spells, and
cleric or druid spells cast spontaneously), since applying a metamagic
feat to a spontaneously cast spell automatically increases the casting
time to a full-round action.
Based on the entry in Player's Handbook 3.5 Page 98.